Generally speaking, the difference between two cross-spectral densities (CSDs) does not represent a correlation function. We will furnish a sufficient condition so that such difference be a valid CSD. Using such a condition, we will show through some examples how new classes of CSDs can be generated.
© 2014 Optical Society of America
Coherence and Statistical Optics
Original Manuscript: December 9, 2013
Manuscript Accepted: December 29, 2013
Published: March 17, 2014
M. Santarsiero, G. Piquero, J. C. G. de Sande, and F. Gori, "Difference of cross-spectral densities," Opt. Lett. 39, 1713-1716 (2014)